GB1458400A - Photographic cameras - Google Patents

Photographic cameras

Info

Publication number
GB1458400A
GB1458400A GB3501074A GB3501074A GB1458400A GB 1458400 A GB1458400 A GB 1458400A GB 3501074 A GB3501074 A GB 3501074A GB 3501074 A GB3501074 A GB 3501074A GB 1458400 A GB1458400 A GB 1458400A
Authority
GB
United Kingdom
Prior art keywords
output
counter
turns
gate
inverter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3501074A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Koki KK
Original Assignee
Seiko Koki KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seiko Koki KK filed Critical Seiko Koki KK
Publication of GB1458400A publication Critical patent/GB1458400A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/091—Digital circuits
    • G03B7/093—Digital circuits for control of exposure time
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/58—Means for varying duration of "open" period of shutter

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Exposure Control For Cameras (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)
  • Stroboscope Apparatuses (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
GB3501074A 1973-08-24 1974-08-08 Photographic cameras Expired GB1458400A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48095008A JPS5045629A (enrdf_load_stackoverflow) 1973-08-24 1973-08-24

Publications (1)

Publication Number Publication Date
GB1458400A true GB1458400A (en) 1976-12-15

Family

ID=14125899

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3501074A Expired GB1458400A (en) 1973-08-24 1974-08-08 Photographic cameras

Country Status (5)

Country Link
US (1) US3999191A (enrdf_load_stackoverflow)
JP (1) JPS5045629A (enrdf_load_stackoverflow)
DE (1) DE2440733C3 (enrdf_load_stackoverflow)
FR (1) FR2241802B1 (enrdf_load_stackoverflow)
GB (1) GB1458400A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51143327A (en) * 1975-06-04 1976-12-09 Canon Inc Photographing data indication system
JPS5945970B2 (ja) * 1975-10-25 1984-11-09 アサヒコウガクコウギヨウ カブシキガイシヤ Ｌｅｄオモチイタフアインダ−ナイヒヨウジソウチ
JPS5421329A (en) * 1977-07-18 1979-02-17 Hitachi Ltd Control system for cameras

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3748979A (en) * 1970-12-28 1973-07-31 Copal Co Ltd Electronic shutter apparatus for cameras
US3836262A (en) * 1971-07-07 1974-09-17 Minolta Camera Kk Indicator circuit
US3827065A (en) * 1971-08-30 1974-07-30 Copal Co Ltd Warning circuit of an electric shutter
JPS5110981B2 (enrdf_load_stackoverflow) * 1971-08-30 1976-04-08
DE2220204C2 (de) * 1972-04-25 1974-05-16 Labtronic Ag Gesellschaft Fuer Klinische Labortechnik, Zuerich (Schweiz) Photometer zur digitalen Anzeige der Konzentration einer Meßprobe in einer Küvette
JPS532567B2 (enrdf_load_stackoverflow) * 1972-09-20 1978-01-30

Also Published As

Publication number Publication date
DE2440733A1 (de) 1975-03-06
FR2241802A1 (enrdf_load_stackoverflow) 1975-03-21
DE2440733B2 (de) 1979-08-02
DE2440733C3 (de) 1980-04-17
JPS5045629A (enrdf_load_stackoverflow) 1975-04-23
FR2241802B1 (enrdf_load_stackoverflow) 1981-05-29
US3999191A (en) 1976-12-21

Similar Documents

Publication Publication Date Title
JPS53113527A (en) Camera for definite multiplication image in the variable multiplicaton lens system
GB1481214A (en) Photographic camera
SE329085B (enrdf_load_stackoverflow)
GB1339587A (en) Diaphragm assembly for an interchangeable lens of a camera
GB1458400A (en) Photographic cameras
GB1194393A (en) Improvements in and relating to Photographic Cameras
JPS5289938A (en) Single lens reflex camera using pentaprism
GB1336536A (en) Single-lens reflex cameras
JPS5383737A (en) Single lens reflex camera
JPS5270830A (en) Lens interchangeable camera
GB1048365A (en) An exposure meter for a camera
GB1385075A (en) Exposure time computation circuit for cameras
US4518243A (en) Shutter speed setting device for camera
GB1181805A (en) Photographic Camera having Exposure Control Means
GB1037503A (en) Photographic camera
JPS52152220A (en) Exposure display device for single lens reflex camera of automatic exposure control type
JPS5325432A (en) L ight measure circuit for camera
GB882650A (en) Improvements in or relating to television cameras that include optical arrangements comprising a zoom lens
GB1183435A (en) Single Lens Reflex Camera
JPS52114320A (en) Single lens reflex camera
GB1479705A (en) Photographic cameras
JPS5328405A (en) Optical information reproducer
JPS5244652A (en) Reflecting mirror for a single-lens reflex camera
JPS5543515A (en) Strobe for camera
JPS53122422A (en) Single lens reflex camera

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee